Question

Which method separate mixture of copper oxide to zinc oxide?

Answer 1

I think that the best economic method is by burning the mixture in an electrical furnace to a temp. 640 degree C. to melt both Zinc & Aluminum leaving copper oxide as a powder.

Answer 2

To, seperate it add excess of sodium hydroxide to the mixture, zinc oxide being an amphoteric oxide reacts with base to form a solution sodium zincate while CuO not being amphoteric in nature does not dissolve in it and can be seperated out .